I suggest you read President Monson's talk from last coference, the 3 R's of Choice. It talks about the right we have to choose, the responsibility that comes from our choices and the results of choice, he talks about how all of us make mistakes, but that is why the Lord atoned for us, so that we could repent.
It is not easy, but you are faced with a choice right now. I think deep down you know what is the right choice, but it's extremely difficult, intimidating and scary to know the consequences that may follow. Have courage to do what is right, despite anything. The Lord will carry you and once you feel the love of him through repentance you can finally be healed. A person who hasn't been in your situation can't possibly know how hard it is (I am one of those) but there is one path to God and we must be willing to accept the consequences in order to gain Eternal Salvation.
This is a test, your test, and to prove yourself worthy of the blessings of God and the presence of the Holy Ghost you must make the right choice. Seriously, read the article, it's a good one :) There is nothing more empowering than having sins washed away and feeling clean again. Take care of it now so you can become free of the chains of bondage that now hold you because of your actions.
We are on this earth to prove ourselves worthy of eternal life. Don't waste the days of your proabation. There is nothing in this world that is worth risking your eternal life. I make no judgement on you as a person except that we are all here, making mistakes but moving toward the same goal...I would hope that people will help carry you despite your sins......we are all sinners afterall. I would avoid the danger of justifying your reasons for not repenting as we know that is Satan's greatest tool. Have courage and get it over with! :)